CVE-2026-33811

Crash when handling long CNAME response in net

CVSS 7.5 HIGHEPSS 0.6%

When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a crash.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Produtos afetados

Go standard library · net

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Referências

https://go.dev/cl/767860 https://go.dev/issue/78803 https://groups.google.com/g/golang-announce/c/qcCIEXso47M https://pkg.go.dev/vuln/GO-2026-4981